11811807 has 18 divisors (see below), whose sum is σ = 19543992. Its totient is φ = 6734016.

The previous prime is 11811797. The next prime is 11811847. The reversal of 11811807 is 70811811.

It is not a de Polignac number, because 11811807 - 2¹⁹ = 11287519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811847) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27063 + ... + 27495.

Almost surely, 2^11811807 is an apocalyptic number.

11811807 is a deficient number, since it is larger than the sum of its proper divisors (7732185).

11811807 is an frugal number, since it uses more digits than its factorization.

11811807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 27.

The square root of 11811807 is about 3436.8309530729. The cubic root of 11811807 is about 227.7397191398.

Multiplying 11811807 by its product of nonzero digits (448), we get a square (5291689536 = 72744²).

The spelling of 11811807 in words is "eleven million, eight hundred eleven thousand, eight hundred seven".